Issue #18 Fix call to erl to bake_cookie()

erldapp.init file in sample folder has the function bake_cookie which uses the variable ERL. However, the the -boot option is not being mentioned which throws error {"init terminating in do_boot",{'cannot get bootfile','/home/vagrant/..../bin/start.boot'}}.

This was because erlang is looking for boot script in the wrong path. The fix needed is to edit the line that calls bake_cookie in the app from $ERL -noshell -eval "io:fwrite(\"~s\", [erldapp:bake_cookie()])." -s init stop > $COOKIE_FILE

to

$ERL -boot $ERL_BOOT -noshell -eval "io:fwrite(\"~s\", [erldapp:bake_cookie()])." -s init stop > $COOKIE_FILE.
Issue #19 Set correct cookie in sample app
Issue #18 Fix boot line to not try to load app
Issue #21 Add HOME setting to sample init script